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Reinsurance - Current Ratings from Rating Agencies and Unsecured Net Amounts Due from Reinsurers Whose Aggregate Balance Exceeded 3% of Stockholders' Equity (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Ceded Credit Risk [Line Items] |  |
Reinsurance unsecured amounts due from reinsurers | $ 44,232 | $ 114,107
Florida Hurricane Catastrophe Fund “FHCF” |  |
Ceded Credit Risk [Line Items] |  |
Reinsurance unsecured amounts due from reinsurers | 29,125 | 91,275
Aeolus Re LTD |  |
Ceded Credit Risk [Line Items] |  |
Reinsurance unsecured amounts due from reinsurers | 15,107 | 0
Various Lloyd’s of London Syndicates | AM Best, A Rating | Standard & Poor's, AA- Rating |  |
Ceded Credit Risk [Line Items] |  |
Reinsurance unsecured amounts due from reinsurers | $ 0 | $ 22,832
Customers with Greater than 3% of Equity | Stockholders' Equity, Total | Amounts Due From Reinsurers |  |
Ceded Credit Risk [Line Items] |  |
Unsecured amounts due from reinsurers exceeding a fixed percentage of stockholders equity | 3.00% |

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